9. A car drives to the north, but it speeds up. Which direction does its acceleration point? Explain.
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- 5. An object is launched 15 m/s horizontally. A. Fill in the variables for the object. B. Solve for time in the y-direction. C. Since the x-direction is constant speed, solve for Ax.i need help with Only the last 3 parts ( C D and E)3. Pilots of high-performance aircraft risk loss of consciousness if the undergo accelerations exceeding about 5g. For a military jet flying at 2470 km/hr (about twice the speed of sound), what is the minimum time it takes the jet to reverse its direction in a circular turn while keeping the acceleration below the 5g safety threshold?
- 3. An object is dropped from a height. a. Describe its velocity as its falls to the ground. b. Describe its acceleration as it falls to the ground.An object moves at a constant velocity of 11 m/s to the southwest for an interval of 20 s. Halfway through this interval, what is the magnitude of its instantaneous velocity? a.More information is needed. b.It can be any value from 0 to 22 m/s. c.5.5 m/s d.11 m/s25. An object has increasing velocity when its acceleration is greater than zero. It has increasing speed when its velocity and acceleration have the same sign. For what times is: a. the velocity of the ball increasing? b. The speed of the ball increasing?
- 10. A car drives to the north at constant speed. Which direction does its acceleration point? Explain.1. An object is thrown into the air. The direction of the acceleration of the object as it rises, at its highest point, and as it falls are respectively: up, 0, down up, 0, up down, down, down down, 0, down up, up, up4. A car has an increasing speed at rate of 1.5m/s2 as it rounds a curve. What is the radius of curvature at a point when the speed of the car is 60kph and the magnitude of the total acceleration is 4m/s2? a. 65m b. 69m c. 75m d. 81m
- 1. You are driving at 8.00 m/s south. You accelerate uniformly at 1.10 m/s? north for 5.00 seconds. How fast are you going at the end of the 5.00 seconds? What is your displacement?2. A cart is moving at a constant 1 m/s on a straight track when a small ball is tossed vertically upward. Will the ball land in the cart? Explain the reasoning behind your answer and carefully state the assumptions you made in reaching your answers.1. The cheetah can reach a top speed of 114 km/h. while chasing its prey in a short sprint, a cheetah starts from rests and runs 45 min in a straight line, reaching a final speed of 72 km/h. a. Determine the cheetah's average acceleration during the short sprint, and b. Find its displacement at t= 3.5 s O 4.4m/s2, 27m O 5.6m/s2, 56m O 1.2m/s2, 15m